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Impacts of freezing and degree day temperature variables on wheat yield for the preferred model (SI Appendix, Table S4, column 3), expressed per 24 h (days). Dx,y refers to the degree day variables created from the IDD variables for the thresholds x and y. Each four-bar cluster shows impacts for the Fall, Winter, and Spring months. Bars show 95% confidence intervals using SEs clustered by year and variety.
